... , is abasic materials for industries or construction 1 GI pipe1 galvanized pipe hollow structural section,1 hollow pipe section1.ASTM A53,ASTM A500 ... , ASTM A513, 2.ANSI C80.1 ,ANSI C80.3 3.BS1387, BS1139 4.EN10219,EN10220,EN10240 ... ,EN10255 5.DIN2440,DIN2444,DIN2458 6.AS1163,AS1074,AS2556OuterDiamete: 1/2"to16"Wallthickness: 0.6mm-20mmLength: Max 12metersSdandard: GB, ...